-LRB- CNN -RRB- -- A day after 20 million gallons of water gushed out of an old , broken water main , UCLA had quite a mess on its hands Wednesday -- and it still was trying to figure out how big .

Hundreds of vehicles were waterlogged and stranded . A famous basketball court might be ruined .

`` We 're nowhere near -LRB- figuring the cost -RRB- yet , '' UCLA Assistant Vice Chancellor Kelly Schmader said near the north side of campus , not far from where workers still were trying to stanch residual leaks in the damaged underground Los Angeles water pipe . `` Some of the facilities that have water in them , we 're not able to make damage assessments yet . ''

The juncture of a 93-year-old water pipe and a 58-year-old pipe burst under famed Sunset Boulevard on Tuesday afternoon , city officials said , with the ensuing geyser sending an estimated 20 million gallons of water shooting into the sky and streaming into nearby open areas and buildings -- notably parts of the UCLA campus just to the south .

No one was injured , but damage to some campus parking garages and athletic facilities was `` substantial , '' Schmader said .

Water rushed into two underground parking facilities , he said .

The school said Wednesday afternoon that 960 vehicles were still trapped inside .

Those vehicles that are n't trapped appear to have some level of water damage , Schmader said . Most of the autos belonged to UCLA students , faculty and staff members who were on campus for the end of the summer session .

`` I went back to my car to try and leave , and they told me that I could n't leave the structure because it was flooded , '' a woman told CNN affiliate KTLA . `` And I walked to the side that was flooded , and I thought , ` So there goes my car . ' ''

Swift-water rescue crews with boats had to ferry away several stranded people Tuesday , and at least three motorists were rescued from the garages . A section of Sunset Boulevard remained closed Wednesday . City councilman Joe Buscaino said the goal was to have the road reopened by Friday .

Workers pumped and pushed water out of the damaged facilities .

At UCLA 's Pauley Pavilion , the recently renovated home of the school 's basketball , volleyball and gymnastics teams , 8 to 10 inches of water had collected on the Nell and John Wooden Court , the hoops surface named for the 10-time NCAA title-winning basketball coach and his wife .

Water covers volleyball courts

Video from KTLA showed workers using machines and squeegees to dry the court and push water out of the arena .

`` The court is showing signs of buckling and expansion right now . Whether we 'll be able to save that court , I do n't know , '' Schmader said .

UCLA athletic director Dan Guerrero said in a written statement that he was confident the arena and court will be ready by the time basketball season begins in late October .

The flooding comes just two years after UCLA completed a $ 136 million renovation of the arena .

The John Wooden recreation center and the Arthur Ashe Student Health and Wellness Center were without power because their transformers , like the vehicles , were submerged in the parking garages , Schmader said . The J.D. Morgan Center , which houses the college 's athletics hall of fame , also was waterlogged , with workers piling strips of wet carpet outside .

UCLA academic and residential halls were not affected , and classes continued Wednesday .

It 's not clear what cause the burst . But it happened at a very bad time for the city and state .

Drought-stricken California recently passed statewide water restrictions , and Gov. Jerry Brown declared a drought emergency in January .

`` Unfortunately , we lost a lot of water -- around 35,000 gallons a minute -- which is not ideal in the worst drought in the city 's history , '' Los Angeles City Councilman Paul Koretz said . `` So we ask everybody to try harder to conserve water . ''

Repair work on the pipe wo n't be completed Wednesday , but thanks to water rerouting , no one was out of water service because of the break , said Jeff Bray , superintendent of the city 's Department of Water and Power .

About 1,000 gallons a minute were still leaking from the pipe Wednesday afternoon , said Jim McDaniel of that agency .

CNN 's Sonya Hamasaki , Holly Yan , Steve Almasy and Stella Chan contributed to this report .

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UCLA says 960 vehicles stranded in underground parking garages

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Authorities estimate 20 million gallons of water spilled

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Several inches of water covered the court at Pauley Pavilion

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California had just passed statewide watering restrictions due to drought